diff --git a/src/Service/RisingTideGateway.php b/src/Service/RisingTideGateway.php
index 0a4ba1aa..5928e72e 100644
--- a/src/Service/RisingTideGateway.php
+++ b/src/Service/RisingTideGateway.php
@@ -36,7 +36,7 @@ class RisingTideGateway
         // at this point, assume that mobile is numeric and valid mobile number
         $clean_num = $this->cleanPhoneNumber($mobile_num);
 
-        if ($clean_num == false)
+        if ($clean_num === false)
             error_log('Invalid mobile number provided. Cannot send SMS message to ' . $mobile_num);
         else
         {